Counting apparatus and rotation stopped detection apparatus which uses a counting apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 18, 2001
Issued Date -
N/A
app pub date -
Jun 20, 2000
filing date -
Oct 11, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A counting apparatus having excellent fail-safe characteristics can be used in a rotation-stopped detection apparatus. As a first feature, timing of a high-frequency signal P.sub.2 is carried out by a counter 1 after completion of a counting of pulse signals P.sub.1. When the frequency of the timing output for the high-frequency signal is a predetermined value, a judgment signal, indicating that the counting is normal, is generated by a frequency discriminating circuit 30. As a second feature, a counter 100 is preset using a preset signal. Then, after verifying by an output from a self hold circuit 102 that the counter 100 has been reset, a counting output is generated from a self hold circuit 104. As a third feature, the counting apparatus is used as timer circuits 203, 300, 400, and the generation frequency of a rotation detection pulse signal I.sub.P based on a sensor signal, is obtained to thereby detect a rotation-stopped condition of a rotating body.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully